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https://www.readbyqxmd.com/read/29350901/adsorption-and-diffusion-of-lithium-and-sodium-on-defective-rhenium-disulfide-a-first-principles-study
#1
Sankha Mukherjee, Avinav Banwait, Sean Grixti, Nikhil A Koratkar, Chandra Veer Singh
Single layer Rhenium disulfide (ReS2) is a unique material with distinctive, anisotropic electronic, mechanical and optical properties and has the potential to be used as an anode in alkali metal ion batteries. In this work, first principles calculations were performed to systematically evaluate the potential of monolayer pristine and defective ReS2 as anodes in lithium (Li) and sodium (Na)-ion batteries. Our calculations suggest that there are several potential adsorption sites for Li and Na on pristine ReS2, owing to its low-symmetry structure...
January 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29350439/tandem-mass-spectroscopy-as-a-tool-for-investigation-of-complexes-of-pnp-lariat-ether-derivative-with-metals-ions
#2
Natalia Gutowska, Piotr Seliger, Grzegorz Andrijewski, Grażyna Adamus, Iwona Kwiecień
The novel PNP-lariat ether L with cyclotriphosphazene ring incorporated in the macrocyclic structure was synthesized and checked by the ESI-MS method for the ability to bind different types of ions Ag+ , Ca2+ , Cd2+ , Cu2+ and Pb2+ . Furthermore, the stability constants of the abovementioned ions complexes with the investigated ligand have been determined by direct and competitive potentiometric methods. In order to evaluate the stability of various complexes types and to confirm the way of metal cation binding, the tandem mass spectra (MS/MS) of the investigated ligand and its complexes were taken...
January 19, 2018: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/29350355/the-biosorption-of-cadmium-and-cobalt-and-iron-ions-by-yeast-cryptococcus-humicola-at-nitrogen-starvation
#3
Tatiana Kulakovskaya, Lyubov Ryazanova, Anton Zvonarev, Galina Khokhlova, Vladimir Ostroumov, Mikhail Vainshtein
Yeasts Cryptococcus humicola accumulated cadmium, cobalt, and iron (~ 50, 17, and 4% of the content in the medium, respectively) from the medium containing glucose, phosphate, and 2 mmol/L of metal salts. The effects of metal absorption on the levels of orthophosphate (Pi) and inorganic polyphosphate (polyP) varied for the metals under study. The levels of Pi and polyP increased in the case of cadmium and cobalt, respectively. In the case of iron, no changes in the levels of Pi and polyP were observed. Multiple DAPI-stained polyP inclusions were observed in the cytoplasm of cadmium-containing cells...
January 19, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29350096/%C3%AE-tocopherol-protected-against-cobalt-nanoparticles-and-cocl2-induced-cytotoxicity-and-inflammation-in-balb-3t3-cells
#4
Xin Yan, Yake Liu, Tian Xie, Fan Liu
CONTEXT: Currently, tissue damage induced by cobalt nanoparticles (CoNPs) and cobalt ions (Co2+) are the most serious adverse effect in the patients with metal-on-metal hip prostheses. Therefore, an urgent need exists for the identification of the mechanisms and the development of therapeutic strategies to limit it. OBJECTIVE: We aimed to explore the mechanisms of cytotoxicity of CoNPs and Co2+ and developed strategies to reduce this cytotoxicity with α-tocopherol treatment...
January 19, 2018: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/29350034/probing-the-complexities-of-structural-changes-in-layered-oxide-cathode-materials-for-li-ion-batteries-during-fast-charge-discharge-cycling-and-heating
#5
Enyuan Hu, Xuelong Wang, Xiqian Yu, Xiao-Qing Yang
The rechargeable lithium-ion battery (LIB) is the most promising energy storage system to power electric vehicles with high energy density and long cycling life. However, in order to meet customers' demands for fast charging, the power performances of current LIBs need to be improved. From the cathode aspect, layer-structured cathode materials are widely used in today's market and will continue to play important roles in the near future. The high rate capability of layered cathode materials during charging and discharging is critical to the power performance of the whole cell and the thermal stability is closely related to the safety issues...
January 19, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29349663/ibandronate-metal-complexes-solution-behavior-and-antiparasitic-activity
#6
Bruno Demoro, Santiago Rostán, Mauricio Moncada, Zhu-Hong Li, Roberto Docampo, Claudio Olea Azar, Juan Diego Maya, Julia Torres, Dinorah Gambino, Lucía Otero
To face the high costs of developing new drugs, researchers in both industry and academy are looking for ways to repurpose old drugs for new uses. In this sense, bisphosphonates that are clinically used for bone diseases have been studied as agents against Trypanosoma cruzi, causative parasite of Chagas disease. In this work, the development of first row transition metal complexes (M = Co2+, Mn2+, Ni2+) with the bisphosphonate ibandronate (iba, H4iba representing the neutral form) is presented. The in-solution behavior of the systems containing iba and the selected 3d metal ions was studied by potentiometry...
January 18, 2018: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/29349459/a-versatile-single-molecular-precursor-for-the-synthesis-of-layered-oxide-cathode-materials-for-li-ion-batteries
#7
Maofan Li, Jiajie Liu, Tongchao Liu, Mingjian Zhang, Feng Pan
A carbonyl-bridged single molecular precursor LiTM(acac)3 [transition metal (TM) = cobalt/manganese/nickel (Co/Mn/Ni), acac = acetylacetone], featuring a one-dimensional chain structure, was designed and applied to achieve the layered oxide cathode materials: LiTMO2 (TM = Ni/Mn/Co, NMC). As examples, layered oxides, primary LiCoO2, binary LiNi0.8Co0.2O2 and ternary LiNi0.5Mn0.3Co0.2O2 were successfully prepared to be used as cathode materials. When they are applied to lithium-ion batteries (LIBs), all exhibit good electrochemical performance because of their unique morphology and great uniformity of element distribution...
January 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29348658/novel-multifunctional-cheese-like-3d-carbon-bn-as-a-highly-efficient-adsorbent-for-water-purification
#8
Zhenya Liu, Yi Fang, Huichao Jia, Chong Wang, Qianqian Song, Lanlan Li, Jing Lin, Yang Huang, Chao Yu, Chengchun Tang
In this paper, a novel three dimensional carbon boron nitride (3D C-BN) was successfully prepared. The obtained material has porous cheese-like structure and pore size ranging from 2 nm to 100 nm. Attractively, the 3D C-BN, which combines the adsorption advantages of BN and carbon together, exhibits excellent adsorption properties for organic dyes, oils and heavy metal ions. The maximum removal capacities of 3D C-BN for methyl blue (MB) and congo red (CR) are 408 mg g-1 and 307 mg g-1, respectively...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348048/identification-of-number-and-type-of-cations-in-water-soluble-cs-and-na-calix-4-arene-bis-crown-6-complexes-by-using-esi-tof-ms
#9
Shogo Kumagai, Kotaro Hayashi, Tomohito Kameda, Naoya Morohashi, Tetsutaro Hattori, Toshiaki Yoshioka
The treatment of cesium-contaminated wastewater has become one of the biggest issues. The selective Cs+ removal from wastewater containing competitive alkali metal ions such as Na+ is desired to reduce the volume of sludge. Therefore, the present work focused on water-soluble calix[4]arene-bis-crown-6 (W-BisC6) to selectively capture Cs+. For characterization of the complex, UV-vis spectroscopy is commonly used, however, due to the limited availability of information it can be hard to quickly identify the specific structures of some complexes...
January 11, 2018: Chemosphere
https://www.readbyqxmd.com/read/29347842/in-vitro-antioxidant-potential-and-in-vivo-effects-of-schinus-terebinthifolia-raddi-leaf-extract-in-diabetic-rats-and-determination-of-chemical-composition-by-hplc-esi-ms-ms
#10
Camila Cristina Iwanaga, Lilian Dos Anjos Oliveira Ferreira, Karine Zanoli Bernuci, Carla Maria Mariano Fernandez, Fabiana Brusco Lorenzetti, Camila Caviquioli Sehaber, Flávia Cristina Vieira Frez, Sara Santos Bernardes, Gean Pier Panizzon, Giani Andrea Linde, Maria do Carmo Vieira, Jacqueline Nelisis Zanoni, Diógenes Aparício Garcia Cortez
The present study investigated the in vitro and in vivo antioxidant potential and phytochemical composition of Schinus terebinthifolia, which is widely used in folk medicine for various therapeutic purposes. The in vitro analyses indicated that the hydroethanolic extract (HE) had 312.50 ± 0.50 mg GAE/g of total phenols. It also presented anti-DPPH• and anti-ABTS•+ activity, reduced phosphomolybden and metal ions and blocked the bleaching of β-carotene. The HE at concentrations of 3.0 and 2.0 μg/mL had TRAP values of 2...
January 18, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29345900/high-performance-ga2o3-anode-for-lithium-ion-batteries
#11
Xun Tang, Xin Huang, Yongmin Huang, Yong Gou, James Pastore, Yao Yang, Yin Xiong, Jiangfeng Qian, Joel D Brock, Juntao Lu, Li Xiao, Héctor D Abruña, Lin Zhuang
There is a great deal of interest in developing battery systems that can exhibit self-healing behavior, thus enhancing cycleability. Given that gallium (Ga) is a metal that melts near room temperature, we wanted to test if it could be employed as a self-healing anode material for lithium ion batteries (LIBs). However, Ga nanoparticles (NPs), when directly applied, tended to aggregate upon charge/discharge cycling. To address this issue, we employed carbon-coated Ga2O3 NPs as an alternative. By controlling the pH of the precursor solution, highly dispersed and ultra-fine Ga2O3 NPs, embedded in carbon shells, could be synthesized through a hydrothermal carbonization (HTC) method...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345546/enhanced-biosorption-of-transition-metals-by-living-chlorella-vulgaris-immobilized-in-ca-alginate-beads
#12
Ashfaq Ahmad, A H Bhat, Azizul Buang
In this study freely suspended and Ca-alginate immobilized C. vulgaris cells were used for the biosorption of Fe(II), Mn(II), and Zn(II) ions, from the aqueous solution. Experimental data showed that biosorption capacity of algal cells was strongly dependent on the operational condition such as pH, initial metal ions concentration, dosages, contact time and temperature. The maximum biosorption of Fe(II) 43.43, Mn(II) 40.98 and Zn(II) 37.43 mg/g was achieved with Ca-alginate immobilized algal cells at optimum pH of 6...
January 18, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29345458/synthesis-of-magnetite-semiconductor-metal-trimer-nanoparticles-through-functional-modular-assembly-a-magnetically-separable-photocatalyst-with-photothermic-enhancement-for-water-reduction
#13
Fei Pang, Ruifang Zhang, Dengpeng Lan, Jianping Ge
Hybrid nanoparticles have intrinsic advantages to achieve better activity in photocatalysis compared to single component materials, as it can synergistically combine functional components which promote light absorption, charge transportation, surface reaction and catalyst regeneration. Through functional modular assembly, a rational and stepwise approach has been developed to construct Fe3O4-CdS-Au trimer nanoparticles and its derivatives as magnetically separable catalysts for photothermo-catalytic hydrogen evolution from water...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345457/lithium-expulsion-from-solid-state-electrolyte-li6-4la3zr1-4ta0-6o12-by-controlled-electron-injection-in-sem
#14
Xiaowei Xie, Juanjuan Xing, Dongli Hu, Hui Gu, Cheng Chen, Xiangxin Guo
The garnet ionic conductor is one of promising candidate electrolytes for all-solid-state secondary lithium batteries, thanks to its high lithium ion conductivity, good thermal and chemical stability. However, its microstructure is difficult to approach since it is very sensitive to the inquisitive electron beam. In this study based on scanning electron microscope, we found that the electron beam expulses the lithium out of Li6.4La3Zr1.4Ta0.6O12 (LLZTO), and the expulsed zone expands to where a stationary beam could extend and penetrate...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345056/for-when-bacterial-infections-persist-toll-like-receptor-inducible-direct-antimicrobial-pathways-in-macrophages
#15
REVIEW
Claudia J Stocks, Mark A Schembri, Matthew J Sweet, Ronan Kapetanovic
Macrophages are linchpins of innate immunity, responding to invading microorganisms by initiating coordinated inflammatory and antimicrobial programs. Immediate antimicrobial responses, such as NADPH-dependent reactive oxygen species (ROS), are triggered upon phagocytic receptor engagement. Macrophages also detect and respond to microbial products through pattern recognition receptors (PRRs), such as TLRs. TLR signaling influences multiple biological processes including antigen presentation, cell survival, inflammation, and direct antimicrobial responses...
January 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29344998/role-of-ap-endonuclease-ape1-active-site-residues-in-stabilization-of-the-reactant-enzyme-dna-complex
#16
Hossein Batebi, Jovan Dragelj, Petra Imhof
Apurinic/apyrimidinic endonuclease 1 (Ape1) is an important metal-dependent enzyme in the base excision repair mechanism, responsible for the backbone cleavage of abasic DNA through a phosphate hydrolysis reaction. Molecular dynamics simulations of Ape1 complexed to its substrate DNA performed for models containing one or two Mg2+ -ions as cofactor located at different positions show a complex with one metal ion bound on the leaving group site of the scissile phosphate to be the most likely reaction-competent conformation...
January 18, 2018: Proteins
https://www.readbyqxmd.com/read/29344735/hydrochemistry-and-water-quality-of-rewalsar-lake-of-lesser-himalaya-himachal-pradesh-india
#17
Pawan Kumar Gaury, Narendra Kumar Meena, A K Mahajan
The present research is to study hydrochemistry and water quality of Rewalsar Lake during pre-monsoon, monsoon, and post-monsoon seasons. The Ca2+ and Na+ are observed as the dominant cations from pre- to post-monsoon season. On the other hand, HCO3- and Cl- are observed dominant anions during pre-monsoon and monsoon seasons, whereas HCO3- and SO42- during post-monsoon season. The comparison of alkaline earth metals with alkali metals and total cations (Tz+) has specified that the carbonate weathering is the dominant source of major ions in the water of lake...
January 17, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29344588/a-helical-chain-like-organic-inorganic-hybrid-arsenotungstate-with-color-tunable-photoluminescence
#18
Hechen Wu, Rong Wan, Yanan Si, Pengtao Ma, Jingping Wang, Jingyang Niu
A 1-D infinite helical chain-like organic-inorganic hybrid arsenotungstate Na4H8[{Pr(H2O)2}2{As2W19O68}{WO2(mal)}2]·24H2O (mal = malate) (1) was prepared, which was characterized by elemental analyses, thermogravimetric (TG) analyses, IR spectroscopy, powder X-ray diffraction (PXRD) and X-ray single-crystal diffraction. Structural characterization revealed that 1 comprises the organo-functionalized [{As2W19O68}{WO2(mal)}2]18- polyanions hinged together by the Pr3+ ions forming a 1-D infinite helical chain-like architecture...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29343696/decoupled-in-plane-dipole-resonance-modulated-colorimetric-assay-based-optical-ruler-for-ultra-trace-gold-au-detection
#19
Ajoy Mandal, Maireyee Bhattacharya, Denis V Kuznetsov, Tapas Ghosh, Sudeshna Das Chakraborty, Biswarup Satpati, Vsevolod Mazov, Dulal Senapati
Decoupling of different plasmon resonance modes (in-plane, and out-of-plane dipole and quadrupole resonances) by tuning nanoparticle's size and shape offers a new field of plasmonics as colorimetric assay-based optical-ruler for ultra-trace sensing. Driven by its low cost, easy to perform and efficient way to measure trace level (up to 30 ppt in presence of common mining elements in natural gold ore) abundance, this study develops a highly selective and ultrasensitive turn-on colorimetric sensor to detect gold-ion from environmental samples...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343056/a-phosphorescent-trinuclear-gold-i-pyrazolate-chemosensor-for-silver-ion-detection-and-remediation-in-aqueous-media
#20
Prabhat K Upadhyay, Sreekar B Marpu, Erin N Benton, Corshai L Williams, Ameya Telang, Mohammad A Omary
We report a phosphorescent chemosensor based on a trinuclear Au(I) pyrazolate complex or [Au(3-CH3,5-COOH)Pz]3, (aka Au3Pz3) stabilized in aqueous chitosan (CS) polymer media. Au3Pz3 is synthesized in situ within aqueous CS media at pH ~ 6.5 and room temperature (RT). Au3Pz3 exhibits strong red emission (λmax ~690 nm) in such solutions. The Au3Pz3 emission is found to be sensitive to sub-ppm/nM levels of silver ions. On addition of silver salt to Au3Pz3/CS aqueous media, a bright-green emissive adduct (Au3Pz3/Ag+) with peak maximum within 475-515 nm is developed...
January 17, 2018: Analytical Chemistry
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